Tag Archives: replacement

Advisory: Failing Radiator Fans in Jeep JKs

My Jeep had been sitting in the garage for maybe a week.  So I decided to start it up one day, and was greeted with a new chime, and the dreaded Check Engine Light.

I ran my diagnostics through the Bully Dog, and the result was surprising – it returned codes for P0113 – Intake Air Temperature Sensor Circuit High, and P0480 – Fan 1 Control Circuit.

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I forced the fan on via the Bully Dog, and nada.  As a friend of mine recently replaced his fan assembly, I figured I was also looking at a $120 bill and 10 minutes of work.  Well I was wrong.  He has the 3.8l.  The new fan (OEM replacement) is a whopping $500 and very hard to find in stock.

With my wedding approaching (and the Jeep playing a key role in it) I was desperate to find out what was happening.

  1. Fuse and relay check.  I purchased some new fuses, and replaced it.  I ensured all relays and other stuff was firmly seated.

2. I inspected all wiring for abrasions and issues.

3. Last, I went on eBay and found a listing for a new fan for $300.

Before getting the new fan, a good friend came over with a much better understanding of vehicle electronics, and helped me further diagnose.

We soon found the problem!  There are 3 wires that comprise the fan harness.  Black is ground, red is hot, and green carries a signal between 9v-12v and that basically allows the fan to operate on a scale based on engine temps.  It isn’t a straight on/off fan.

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That little green wire had some sort of a short in the connectors.  We disassembled the connectors, reseated everything, and put everything back together.  I cleared the codes, and it has been great ever since.

So, before you panic and replace a $500 fan, check your wiring!

PS.  To the eBay seller in Miami that graciously let me cancel my order, thank you!!!

 

ADVISORY: 3.6L Pentastar Oil Assembly Explosion!

Ok, well maybe an explosion is a strong statement.

Anyway, I just had a crazy thing happen to me while changing my oil.  And, after a quick scan of the web, this is a relatively new issue now that many of the 3.6l Pentastar engines are aging.  This issue seems to only affect model years 2012-2013. 

As with all my oil changes, I left the oil filter cap off while the oil drained.  I was actually in the process of attaching the new o-ring to the cap, and pulling the new filter from the box when BANG!  The sound of a gunshot echoed in the shop.  On the floor was a long plastic piece, and a large spring rolling around.  Oil was sprayed on the fenders, under hood, and the floor.

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The parts I was able to find on my floor.

Upon closer inspection, the long black tube is part of the oil filter bypass valve assembly.  It was missing the smaller spring (from inside the tube) and the valve part itself, which is typically seated at the end of this long tube.  I scoured the shop, and have not been able to find those parts.  They either bounced off the inside of my hood, and into another dimension, or will provide a nice waft of burning plastic someday.

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Dirty oil is everywhere.

The internet also showed me the $200 part I needed to buy. However, on further Googling, I saw that Dorman now makes a little replacement kit $21.95 on Amazon).  Of course, Chrysler’s revenue agents would not allow an OEM kit, unless you buy the entire $200 assembly.  Video here.  Forum links here.

I ordered the replacement parts on Amazon, and will update this post once I install them on Tuesday.

**NOTE: The force this stuff came flying out of the oil filter canister could cause serious injury, especially to the face!  I think it dented the inside of my hood.  PLEASE keep your face away from the oil filter assembly, or replace it with the new filter and cap right away.